/home/darren/.local/lib/python2.7/site-packages/matplotlib/sphinxext/plot_directive.py:322: PlotWarning: Exception running plot /home/darren/Projects/matplotlib/doc/mpl_examples/pylab_examples/geo_demo.py
Traceback (most recent call last):
  File "/home/darren/.local/lib/python2.7/site-packages/matplotlib/sphinxext/plot_directive.py", line 319, in render_figures
    run_code(plot_path, function_name, plot_code, context=context)
  File "/home/darren/.local/lib/python2.7/site-packages/matplotlib/sphinxext/plot_directive.py", line 230, in run_code
    "__plot__", fd, fname, ('py', 'r', imp.PY_SOURCE))
  File "geo_demo.py", line 10, in <module>
  File "/home/darren/.local/lib/python2.7/site-packages/matplotlib/pyplot.py", line 658, in subplot
    a = fig.add_subplot(*args, **kwargs)
  File "/home/darren/.local/lib/python2.7/site-packages/matplotlib/figure.py", line 766, in add_subplot
    a = subplot_class_factory(projection_class)(self, *args, **kwargs)
  File "/home/darren/.local/lib/python2.7/site-packages/matplotlib/axes.py", line 8397, in __init__
    self._axes_class.__init__(self, fig, self.figbox, **kwargs)
  File "custom_projection_example.py", line 33, in __init__
TypeError: expected string or Unicode object, NoneType found

/home/darren/.local/lib/python2.7/site-packages/matplotlib/sphinxext/plot_directive.py:322: PlotWarning: Exception running plot /home/darren/Projects/matplotlib/doc/mpl_examples/units/artist_tests.py
Traceback (most recent call last):
  File "/home/darren/.local/lib/python2.7/site-packages/matplotlib/sphinxext/plot_directive.py", line 319, in render_figures
    run_code(plot_path, function_name, plot_code, context=context)
  File "/home/darren/.local/lib/python2.7/site-packages/matplotlib/sphinxext/plot_directive.py", line 230, in run_code
    "__plot__", fd, fname, ('py', 'r', imp.PY_SOURCE))
  File "artist_tests.py", line 30, in <module>
  File "/home/darren/.local/lib/python2.7/site-packages/matplotlib/collections.py", line 852, in __init__
    self.set_segments(segments)
  File "/home/darren/.local/lib/python2.7/site-packages/matplotlib/collections.py", line 861, in set_segments
    seg = np.asarray(seg, np.float_)
  File "/home/darren/.local/lib/python2.7/site-packages/numpy/core/numeric.py", line 284, in asarray
    return array(a, dtype, copy=False, order=order)
ValueError: setting an array element with a sequence.